Method of distributed amplifier design utilizing filter synthesis techniques

Abstract

The present invention describes the method and system of applying filter synthesis technique to distributed amplifier design. The method for synthesizing a distributed amplifier comprises the steps of determining an appropriate filter design characteristic, computing inductor and capacitor values, converting the equivalent values into a distributed amplifier with response characteristics that mirror that of the chosen filter. Applying filter synthesis techniques to distributed amplifier design results in predictable amplifier response characteristics. Filter synthesis techniques are used to design filters with controllable characteristics such as gain, cut-off frequency, and roll-off slope. Depending on the desired filter characteristics, appropriate inductor and capacitor sizes can be determined. Transferring these chosen inductors and capacitors sizes to the distributed amplifier results in amplitude and phase responses that behave like a preferred embodiment or prototype filter.

I claim:  
     
       1. A method for synthesizing a distributed amplifier, comprising: 
       determining a filter order; a response type, and a bandwidth, the combination of the filter order, the response type, and the bandwidth producing a pole/zero response;  
       computing inductor and capacitor values based on the pole/zero response;  
       generating an output of the inductor and capacitor values;  
       converting an equivalent capacitor-current source circuit into a first transistor; and  
       converting an equivalent inductors-capacitor circuit into a first transmission line.  
     
     
       2. The method of  claim 1 , further comprising: after the determining step, feeding the filter order, the response type, and the bandwidth into a synthesis analyzer. 
     
     
       3. The method of  claim 2 , further comprising: after the feeding step, deciding if the synthesis of the filter order, the response type, and the bandwidth is successful. 
     
     
       4. The method of  claim 1 , further comprising constructing a distributed amplifier based on the converted values of the first transistor and the first transmission line. 
     
     
       5. A method for synthesizing a distributed amplifier, comprising: 
       selecting a N-order filter and determining a response type, and a bandwidth, the combination of the N-order filter order, the response type, and the bandwidth producing a pole/zero response;  
       computing inductor and capacitor values based on the pole/zero response;  
       generating an output of the inductor and capacitor values;  
       converting an equivalent capacitor-current source circuit into one or more transistors; and  
       converting an equivalent inductors-capacitor circuit into one or more transmission lines, wherein a distributed amplifier with the N-order filter is constructed using the converted one or more transistors and the converted one or more transmission lines.  
     
     
       6. A system for designing a distributed amplifier, comprising: 
       means for determining a filter order; a response type, and a bandwidth, the combination of the filter order, the response type, and the bandwidth producing a pole/zero response;  
       means for computing inductor and capacitor values based on the pole/zero response;  
       means for generating an output of the inductor and capacitor values;  
       means for converting an equivalent capacitor-current source circuit into a first transistor; and  
       means for converting an equivalent inductors-capacitor circuit into a first transmission line.